Spring-driven fan



Oct. 16, 1928.

F. J. SIRL SPRING DRIYEN FAN 2 Sheets-Sheet 1 Filed June 15, 1926 FRANKvyJ'- SmL t 14AM [04u-v Y aimant,

oct. 16, 192s. l 1,687,996

F. J. SIRL SPRING DRIVEN FAN Filed June 15, 1926 2 Sheets-Sheet Q MTM A'2, 39

FRnNK-ISIRL 35% M 1MM, W

Patented ct. 16, 1928.

n UNITED STA l FRANK J.- SIRL, LAKEWOOD, OHIO.

SPRING-DRIVEN FAN.

Application led .Tune 15,

7 My invention relates to an improyement in lspring driven fans, and myobJect in general is to provide suitable spring and gear mecha- 1926.seriai no. 116,090.

out danger of contact with the revolving fan blades. Fan member -15 issecured to the outer end of a sho'rt horizontal shaft 16 which nismadapted ,to rotate a small fan at a relaextends thrbugh'a bushing 17 inthe circularl tively high rate of speed for a substantial \vvall of headl2, thc shaft being supported by period of time. To obtain the necessaryi power for a long run and effective operation,

and to facilitate the assembling and housing of the Working parts Iconstruct and arrange the 'working parts and the winding Ameans in aparticular. way and mount the same in an advantageousmanner in acompartmented casing substantially as herein shown and described and asset forth more particularly in the claims.

Thus, in the accompanying drawings, Fig.

y lis a side view of my improved fan; and Fig.

2 is a vertical section centrally through the fan casing, showing thedriving mechanism in side elevation. Fig. 3 is a horizontal section online 3-3 of Fig. 2, showing the gearing within the upper' chamber in thebase por-l tion of the casing. Fig. 4 is a horizontal section on line4-4 of Fig. 2, showing the spring and winding gears in the lower chamberof the base part of the casing. Fig. 5 is a horizontal section on line5-5 of Fig. 2 showing the friction device for stopping the fan. F ig.y 6is an enlarged vertical section through the fan shaft bearings, and Fig.7 is an enlarged section and side view of the thumb piece forcontrolling the friction stopping device.

The fan structure comprises a casing 2 having a relatively large roundbase 3 which is hollow and subdivided by a horizontal partition 4 toprovide separate chambers 5 and 6 above a bottom plate 7 having legs 8to support the casing. Bottom plate 7 and partition 4 are secured inplace by screws and separately removable to permit access to theoperating mechanism therein within chambers 5 and 6, which mechanism isemployed to drive a vertical shaft 9 carrying at its upper end a largebevel gear 10. A ball race and bearing 11 supportsgear 10 and shaft 9,and beariner part 11 is seated upon the bottom of a roun hollow head 12which forms an integral but smaller part of casing 2, being supported ata suitable elevation in an off-center position above hollow base part 3by a hollow neck 13 through the center of which shaft 9 extends. Thisneck is of reduced diameter at its middle to provide room at the rearthereof for a windin crank 14 diametrically opposite the rotatab e fanmember or pro eller 15, thus permitting hand winding of t e crankwithseparate sets of anti-friction balls 18 confined within separatebearing or ball races 2() seated Within pockets at opposite sides ot.said wall, see Fig. 6.` A collar 21 is fixed to shaft 16 against theouter set of balls, and a bevel gear 22 is secured to the inner end ofthe shaft in bearing engagement. with the other or inn'er set of balls,thus supporting the shaft for rotatable movement and end thrust in avery simple anti-friction way within the casing wall with the small gear22 in mesh with the larger bevel gear 10. A flanged cover plate 12 isremovably attached to head 12 to permit assembly, oiling, etc.

Vertical shaft 9 extends downwardly the center of neck 13 and passesthrough an opening in a bearing plate 23 which is secured to thepartition by. tie and spacing members 24. Bearing plate 23 and partition4'provide a frame for a set of power transmitting lgears 25, and arelatively large number of reduction gears are used in chamber tooperate shaft 9, together with a powerful coiled spring'26 which isconfined in chamber 6. The inner coil of spring 26 is connected to acentral mandrel 27 which is detachably sleeved upon the square extension28 of a main driving shaft 29 for said gearing. Spring26 is coninedwithin an open drum 30 having a slot 31 in its side walls through whichthe hooked extremity 32 of the outer coil of the spring is projected anddetachably connected with said wall. A gear or toothed ilange33 formspart of drum 30 and these parts rest in rotatable `position upon bottomplate 7 together with *for the fan is also provided, comprising a brakedrum 37 secured to the shaft 38 of the last set of operating gears inchamber 5. Brake drum 37 is located on top of plate 23 *within hollowneck 13, and a spring arm 39 extends through an opening 40 in one sidewall of the neck, which arm carries a brake shoe 41 adapted to engageand stop the ro,- tation of the drum and its connected operatingmechanism, A rotatable cam 4Q is mounted on base 3 at one side of springarm 39, whlch cam has a wing or finger piece 43 to -turn the cam andthrow the brake shoe into with the teeth of the large winding gear 334for spring drum 30.

What I claim, is

l. A spring driven fan, comprising a casing having a hollow `basesubdivided by a horizontal partition and formed with a hollow head andhollow relatively long neck surmounting said base, a rotary fansupported upon said head, drive gearing in said head for said fan, anoperating shatt -for said gearing eXtendinga substantial distancedownwardly through said hollow neck into the upper subdivision of saidbasc,'powcr transmitting gearing mounted upon said partition and forminga removable gearing unit therewith,

a spring motor within the lower subdivision of said hollow base havingoperating Connechollow base, a rotary fan mounted upon saidcasing havingoperating gearing confined within the upper chamber and mounted upon Isaid horizontal partition and removable therewith, and a power springand winding means for the spring within the lower chamber, mounted uponsaid bottom plate and removable therewith.

3. A spring driven fan, comprising a hollow casing having a relativelylong cylindrical neck in offset relationship to said casing, and achambered head surmounting said neck, a rotary fan mounted upon saidhead having driving gears confined within said chambered head, avertical shat't for said gearing extending through said neck, a gearingunit for said shaft removably mounted within the upper part of, the baseof said casing, a power sprmg for driving saidshaft removably mounted'within the lower part of the base of said casin Y means g, for windingsaid s ring, and a device i`or stopping operation o said gearing andfan.

In testimony whereof I aiix my signature.

FRANK J. SIRL.

